The stress on a polymer under constant strain relaxes to 42% of its original value in 40 hours. The elastic modulus of the polymer is E = 3.00 MPa. Equation 5.21, Dowling 5th edition, describing stress relaxation, simplifies to: o = 0ge for this process. Use this information to answer the two questions. Be sure to input numbers in the answer fields only; pay attention to specified units. 1) Calculate the time required for the stress to drop to 60% of the original value. 2) Calculate the coefficient of tensile viscosity, n.

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Project Management Techniques

The guideways or the roadways that are undertaken to perform a project efficiently and all the tools required to accomplish the task are the general outlines for project management techniques.